Learn more about services at Mayo Clinic. Your digestive tract stretches from your mouth to your anus. It includes the organs necessary to digest food, absorb nutrients and process waste.

Crohn's disease and ulcerative colitis are both forms of inflammatory bowel disease. Crohn's disease most commonly affects the last part of the small intestine, called the ileum, and parts of the colon. …

Mar 4, 2026 · Nervous system injury, including numbness and tingling in the feet and hands, possible problems with balance, and cognitive impairment. Joint pain. Reduced functioning of the spleen, …

Jan 20, 2024 · Abdomen Digestive tract issues. Barium, a contrast medium delivered in a drink or an enema, can help show problems in the digestive system. Swallowed items. If a child has swallowed …

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Aug 13, 2025 · People with digestive conditions such as celiac disease and Crohn's disease also are at risk of low vitamin B-12 levels. People with very low vitamin B-12 levels can have symptoms such as …

Dec 19, 2025 · Influenza (flu) Overview Flu, also called influenza, is an infection of the nose, throat and lungs, which are part of the respiratory system. The flu is caused by a virus. Influenza viruses are …

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Mayo Clinic

Mar 18, 2025 · The heart and a primitive circulatory system will form in the middle layer of cells, called the mesoderm. This layer of cells also will serve as the foundation for the bones, ligaments, kidneys …